Multipart rivet



U8- 24,1943 w. v. MOUNTS l 2,327,924

MULT IPART R'IVET Filed Aug. 24, 1940 WMF/M0 M Mou/v7.15

Patented Aug. 24, 1943 Wilfred V. Mounts, Stratford, Conn., assigner to Y Remington Arms Company, Inc., a corporation oi.' Delaware Application August 24, 1943, Serial No. 354,002

3 Claims.

The present invention relates to a riveted structure and rivet therefor, and especially such structure as incorporated in the assembly of knife handles, wherein such handles consist of a pair of handle portions, riveted upon the sides of the shank of the knife blade in ther case of fixed blade knives, and riveted upon the spring frame member in the case of folding pocket knives. While the objects and advantages of the invention are particularly related to this use, it will be understood that the invention may rind application in other uses.

It is an object of the present invention to provide a rivet structure which will be low in material and production cost, will provide a ren liable fastening between the handle portions and the shank or frame, and in which the rivet heads, which are exposed upon the surface of the finished handle, will have an attractive appearance.

Because of the fact that the rivet heads are exposed and constitute an Aornamental part of the surface of the handle structure, it has been the practice to form the rivets of a material which would present an attractive appearance, and would maintain such appearance in the normal use of thekniie, and for this reason the cost of such rivets has been a material item in the cost of the product, particularly where expensive metals, such as nickel silver, and the like, have been employed. Also the manner f assembling the vhandle structure by means of rivets, which consisted in upsetting a head upon one end of the rivet, produced an uneven surface which required expensive finishing operations in order to make the rivet heads conform to the surface of the handles, and this has been time-consuming,` expensive, and affected the uniiormity of the product.

It is an object of the invention to provide a riveted structure in which the rivet heads are not altered externally during the assembly operation, so that they may be provided with a finished surface during their production, and further to assemble the structure by electric welding or soldering, to the end that a reliable fastening may be provided without changing the surface characteristics of the rivet heads. A further object is to provide a riveted structure in which the rivet elements may consistl of a plurality of parts formed of different metals selected with a view to their cost and functional characteristics. Thus it is proposed according to one embodiment of the invention to provide a rivet consisting of a pin which is concealed within the riveted structure and which may be of iron, steel, brass, or the like, selected with a view to its strength and small cost, and rivet head members which are exposed, and which may be of nickel-si1ver, copper, or other relatively ex-v pensive material selected with a view to its tlnish and attractive appearance when incorporated in the exposed outer surface of the handle.

Knife handles are usually constructed of nonmetallic materials, as for instance, wood, bone, or composition, and there has been a tendency with previous rivet structures for the handle material to split or break, due to the lateral expension of the rivet during assembly, and also due to relative expansion and contraction of the materials during-use. It is an object of the invention to provide a riveted structure in which this objectionable condition is obviated, and to this end it is proposed to provide a structure which will exert only transverse pressure upon the handle portions to secure them to the intermediate shank or frame, and at the same time to provide a structure which while eliminating lateral pressures upon the handle portions during assembly and use will at the same time effectually maintain the handle portions in accurately aligned position upon the shank or frame. v

With the above and other objects in view, embodiments of the invention are shown in the accompanying drawing, and these embodiments will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawing:

Fig. 1 is a side elevation of a knife provided with a riveted handle according to the invention.

Fig. 2 is a bottom plan view thereof.

Fig. 3 is a view, partially in section and parltially in side elevation, showing the several parts of a riveted structure according to the invention in separated relation before assembly.

Fig. 4 is a plan view from the inner side of one of the rivet head disc members.

Fig. 5 is an end view of the rivet pin mem ber.

Fig. 6 is a view, partially in section and partially in side elevation, showing the assembled riveted structure.

Fig. 'I is a sectional view thereof, taken along the line 1--1 of Fig. 6.

Fig. 8 is a view, partially in section and partially in side elevation, of a modified form of the invention.`

F18. 9 is a side elevation of the two parts of the rivet employed in the structure shown in Fig. 8, and shown in separated relation.

Fig. 10 is a view, vpartially in section and partlally in side elevation. of another modified form of the invention.

Fig. 11 is a side elevation of the two parts of the rivet employed in the structure shown in Fig. 10, and shown in separated relation.

Fig. 12 is a view, partially in section and partially in side elevation, of a further modified form of the invention.

Fig. 13 is' a side elevation of the two parts of the rivet employed in the structure shown in Fig. 12, and shown in separated relation.

Similar reference characters indicate corresponding parts throughout the several figures of the drawing.

Referring to the drawing the knife illustrated by way of example in Figs. 1 and 2, and in which the riveted structure according to the invention is incorporated, consists of a blade I having a shank II, constituting an intermediate base or frame upon the two sides of which there are secured by riveting the handle portions I2-I2, which may be-of wood, bone, composition, or other suitable material. The shank is provided at each point at which a rivet is to be provided with a hole I3, and in each of the handle portions I2-I2 there is provided in axial alignment with each of the holes I3 a hole I4, slightly larger in diameter than the holes I3, and provided at its outer end with a countersink recess' I5, for receiving the rivet head disc as will presently more fully appear.

The rivet, according to the invention, consists of a cylindrical pin member I6, provided at each of its ends with a conical point I1, and the diameter of this pin member is such that it will fit snugly Within the hole I3 of the shank, so as to be rigidly supported thereby perpendicularly to its plane. The length of the pin I6 is such that in the assembled relation, as shown. in Fig. 6, the bases of the conical point ends I1 are slightly within the holes Il, with the points projecting into the recesses I5.

The rivet heads I8-I8 are in the form of fiat cylindrical discs, dimensioned to fit snugly in flush relation within the recesses I of the handle portions, and centrally of the inner surface of each of these rivet head discs there is provided a conical recess I9 of the same angularity but of slightly .less depth than that of the conical point ends I'l of the rivet pin member. These recesses serve to centralize the rivet head discs with respect to the pin, and also provide effective contact surfaces between the discs and the pin for rigidly securing them together either by electric welding or soldering. During the welding or soldering operation the discs i8 and the pin I6 are pressed together axially, and the point ends I'I imbed into and become homogeneously connected to the recesses I9, and as the rivet parts become heated through this action they will upon cooling tightly compress the handle portions I2 against the shank I I. It should be distinctly understood that the discs I8 may be made without the conical recess I8.

Because of the greater depth of the point ends I1 of the rivet pin than the conical recesses I9 of the rivet head discs, undercut annular clearance-spaces are provided between the ends of the cylindrical surface of the pin and the inner surfaces of the rivet head discs, and any out-flowing metal produced during the Welding or soldering operation is confined substantially within these recesses and within the cylindrical outline of the pin. Consequently the surfaces of the holes Il are not engaged by the out-owing metal of the welded or soldered joint, and as the heat expansion of the pin is insuilicient to cause it to contact the hole surfaces, and as it does not undergo any appreciable lateral compressive distortion during the soldering or welding operation, there will be no lateral pressure exerted upon the handle portions which might tend to crack or break them. Furthermore sufiicient clearance is maintained in the assembled riveted structure between the pin I6 and 'the holes I4, so that any expansion or contraction which may occur in the use of the knife due to temperature or moisture changes will not result in damage to the handle through cracking or breaking.

The engagement of the conical point ends I1 of the rivet pin in the conical recesses I9 of the rivet head discs centralizes the discs and accurately positions the knife handle portions -with respect to the pin which in turn is supported rigidly in the hole I 3 of the shank II, so that in the assembled relation the annular clearance spaces between the holes I4 and the pin I6 will be maintained in concentric relation to the pin.

It will be understood that the rivet pin and the rivet head discs may be formed of any suitable metal, or of different metals, capable of being welded or soldered together, and that in the selection of such metal or metals, the metal of the concealed pin may be selected with a view to such considerations as its strength and low-cost, while the metal of the exposed rivet head discs may be selected with a view to its attractive appearance and wearing qualities.

In Figs. 8 and 9 there is illustrated a modified form of rivet structure, according to the invention, in which the rivet consists of a pin I 6a provided at one end with an integral head Iiia and at its other end with a conical point Il, the head I8 adapted to engage the counter-sink recess I5 of one of the handle portions while the conical point end I`In is adapted to be secured by welding or soldering to a rivet head disc I8 engaged in the counter-sink recess I5 of the other handle Yportion I2.

In Figs. 10 and 1l there is illustrated another modification' in which the rivet consists of a pair of identical headed pins each consisting of a pin Ib provided at one end with a conical point I`Ib and at its other end with a head I8. In this modification the disc-like heads IBb are engaged in the counter-sink recesses I5 of the handle portions I2 and the conical point Iends of the pins are brought into contacting relation and welded or soldered together within the hole I3 of the shank II, the cylindrical end portions of the pin adjacent the pointed ends being snugly engaged within the hole I3 to position and centralize the rivet.

In Figs. 12 and 13 there is illustrated a further modification in which the rivet consists of a pair of headed rivet pins each consisting of a pin I5c provided at one end with a conical point I1c and at its other end with a head I8. In this modiication the heads Iiic of the two rivet pins are engaged in the recesses I5 of the handle portions and the conical point ends I`| are secured by welding or soldering to the opposed surfaces of a solid` shank member II, as distinguished from the other embodiments in which a hole I3 is provided in the shank member.

The form of the invention illustrated in the drawing and described herein is typical and illustrativeonly, and it is evident that the invention is capable of embodiments in other forms, all falling within the scope of the appended claims which are to be broadly construed.

What is claimed is:

l, A multi-part rivet, the parts of which are adapted to be rigidly secured together by a heat produced Weld or solder joint, comprising a rivet pin member and a rivet head member, said pin and head members having cooperative centralizing formations upon their contacting surfaces.

2. A multi-part rivet, the parts of which are adapted to be rigidly. secured together by a heat produced weld or solder joint comprising rivet head members anda rivet pin member, at least one of said head members comprising a separate disk having on its inner side a central conical recess, and a conical point at one end of said pin member constructed and arranged to engage said conical recess in centralized relation and to be rigidly secured therein by said heat produced joint.

3. A multi-part rivet, the parts of which are adapted to be rigidly secured together by a heat produced weld or solder joint comprising rivet head members and a rivet pin member, at least one of said head members comprising a separate disk having on its inner side a central conical recess, and a conical point at one end of said pin member constructed and arranged to engage said conical recess in centralized relation and to form therewith an annular clearance space between the base of said conicalpoint and the Wall of said conical recess.

WILFRED V. MOUNTS. 

